Possibly the most vital card here is Steward of the Harvest, which lets you turn all your creatures into up to three lands that you can exile from your graveyard
To determine their rarity, you must look them up on an online database like Scryfall or Gatherer
You do this at the same time you would choose modes or choose a value for an X in a mana cost
The one downside, albeit small, is that Dragons Rage Channeler is much more aggro-orientated than other threats that are usually played in tempo decks
Token Doublers A great majority of the creatures in this deck have ETB abilities, so keep an eye out for the number of triggers which will happen when one of these token doublers is on board, particularly if they are creatures such as Adrix and Nev, Twincasters and/or Mondrak, Glory Dominus, considering both can become tokens thanks to Brenard